Lowered to #(sz - 1) - clz(x), taking advantage of the machine's
8-bit and 16-bit variants of clz and the widening on the second argument
of ISUB to implement neatly in two instructions.
Note that in NIR, ufind_msb can take any integer type but always output
i32.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8774>
Fixes INSTR_INVALID_ENC fault on dEQP-GLES31.functional.compute.basic.empty
Fixes: bfcdc8f174 ("pan/bi: Add some zero bytes after shaders on Bifrost")
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9011>
New scheduler broke this. We need to shuffle some code around so we do
the lower pre-schedule instead of post-schedule (no clauses to work
with).
Fixes: 77933d16d8 ("pan/bi: Switch to new scheduler")
Reported-by: Icecream95 <ixn@disroot.org>
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9011>
There are blit shader specific optimizations available.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9002>
Now that we lower FAU correctly, we don't need to write the extra move
explicitly, it will be lowered in later.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8973>
Move and reshape bi_lower_fau to bi_schedule.c. This generalizes the
pass for FAU reads, allowing copyprop to work with FAU without problems.
The pass must run immediately before scheduling. Its post-conditions are
directly specified as the scheduler's pre-conditions. It momentarily
will depend on internal scheduler predicates. It is, for all intents and
purposes, part of the scheduler. Keep it all together.
Finally, adjust the 0 handling to avoid a move at the expense of
constrained scheduling of something like `FADD.v2f16.clamp_0_1 u0, #0`
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8973>
This makes UBO 0 less special, allowing us to generalize uniform
optimization. Note this disables RMU on Midgard as we're about to
rewrite the RMU mechanism.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8973>
Forces a trivial schedule to replicate the old behaviour (for debugging
or benchmarking). Actually the new scheduler is still used, just highly
constrained; the net result should still do what's expected.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8354>
Rather than doing this at pack time like before, or adding extra
constraints to the already overcomplicated scheduler, let's just include
it like a regular FAU source.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8354>
Less critical than other metrics, but still matters for instruction
cache hit rate, and worth being aware of.
And, fine, it makes the scheduler look like a bigger win on another
axis.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8354>
The prefetch buffer size is larger than first thought, but includes
the final clause, so subtract the size of the final clause from the
prefetch size.
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8354>
For G71 but should work on any Bifrost, probably overlaps some CL stuff.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Acked-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8894>
Needs to take a cursor to be applicable outside NIR->BIR of course.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8723>
We would like to reuse the DCE logic to eliminate register writes
without eliminating instructions, as a post-sched pass. This type of
operation will eventually generalize to intrinsics that write a register
*and* have side effects (just atomics, I think).
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8723>
Ported from Midgard due to the same quirk of our code generation.
Additional validation, though.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8723>
Since 3186401751 ("pan/bi: Suppress disassembly for internal shaders"),
we haven't had a good way to debug blit shaders. I keep rewriting this
patch manually, let's just a debug flag for it.
Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8723>
The intrinsics covered by the pass are implemented by reading 32-bit
registers, so there is no reason to keep them 64-bit.
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8358>
Alyssa Rosenzweig
Boris Brezillon
Icecream95
Connor Abbott